It's Trashgiving Day on Sesame Street, the grouchiest holiday of the year. Oscar is in charge of running the parade this year and it needs to be grouchy enough to please his boss Mr. Disgracey. The parade begins with the marching band, but the music they are playing sounds too good. How can they make the music sound horrible? Chris has an idea of filling the instruments up with water, which will change the sound. The marching band plays their song again, and it sounds horrible. The parade continues, and up next is a float, the Maysour, but the float looks too nice with all of its jewels, flowers, and brightly colored paints. Alan suggests spraying the float with water because water can change how things look. The float is now one big, wet mess with wilted flowers, jewels blown off, and running paint. The parade continues again, and Stenchy the Stinkbug balloon comes by. The balloon is floating in the sky, though, and Grouch balloons are supposed to drag along the ground. Chris and Alan help Oscar figure out that they need something heavier than helium to fill up the balloon. Oscar suggests using water again, and after filling up the balloon, it is now dragging on the ground and ends up soaking everyone. Mr. Disgracey congratulates Oscar and promotes him for organizing the worst "Trashgiving Day Parade" ever!